[Courgette] Disassembler code movement and format fix.
We wish to rename ParseAbs32Relocs() and ParseRel32RelocsFromSections(),
and make them part of the Disassembler interface. This requires moving
chunks of code. This CL does the code movement as an independent change
to reduce noise later.
Also including reformatting changes from "git cl format".
BUG=660980
Review-Url: https://codereview.chromium.org/2728653003
Cr-Original-Commit-Position: refs/heads/master@{#454068}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: dc779d9f0fab468f70ef7fb2cf5029e2373473dc